Microwave oven



FIG. 1 is a perspective view of the top, front and right side of a microwave oven showing our new design; FIG. 2 is a front view thereof; FIG. 3 is a right side view thereof; FIG. 4 is a top plan view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a bottom view thereof; FIG. 7 is a rear view thereof; and, FIG. 8 is a perspective view with the lid in open condition. 

The ornamental design for a microwave oven, as shown and described. 